| Club | Based in | Founded | Home ground |
|---|---|---|---|
| Atlanta Chiefs | Atlanta | 1967 | Atlanta-Fulton County Stadium |
| Baltimore Bays | Baltimore | 1967 | Memorial Stadium |
| Chicago Spurs | Chicago | 1966 | Soldier Field |
| Los Angeles Toros | Los Angeles | 1967 | Los Angeles Memorial Coliseum |
| New York Generals | New York City | 1967 | Yankee Stadium |
| Oakland Clippers | Oakland | 1966 | Oakland Coliseum |
| Philadelphia Spartans | Philadelphia | 1967 | Temple Stadium |
| Pittsburgh Phantoms | Pittsburgh | 1967 | Forbes Field |
| St. Louis Stars | St. Louis | 1966 | Busch Memorial Stadium |
| Chicago Power | — | 1988 | Credit Union 1 Arena |
| Cincinnati Silverbacks | — | 1995 | — |
| Harrisburg Heat | — | 1991 | Pennsylvania Farm Show Complex & Expo Center |